Buckle



FIG. 1 is a perspective view of a buckle showing my new design;

FIG. 2 is an end elevational view;

FIG. 3 is a left side elevational view;

FIG. 4 is a top plan view;

FIG. 5 is a right side elevational view;

FIG. 6 is an end elevational view of the side opposite that shown in FIG. 2; and,

FIG. 7 is a bottom plan view. 

The ornamental design for a buckle, as shown and described. 